21279445702912 has 144 divisors (see below), whose sum is σ = 44316103842304. Its totient is φ = 10186186752000.

The previous prime is 21279445702859. The next prime is 21279445702951. The reversal of 21279445702912 is 21920754497212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2748923362 + ... + 2748931102.

Almost surely, 2^{21279445702912} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21279445702912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22158051921152).

21279445702912 is an abundant number, since it is smaller than the sum of its proper divisors (23036658139392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21279445702912 is an equidigital number, since it uses as much as digits as its factorization.

21279445702912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11456 (or 11442 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 55.

The spelling of 21279445702912 in words is "twenty-one trillion, two hundred seventy-nine billion, four hundred forty-five million, seven hundred two thousand, nine hundred twelve".